Conveying device



Oct- 27, 1935- H. s. -MARMoRsTL-:IN Er AL 2,059,007

CONVEYING .DEVICE Filed Nov. le, 1955 :s sneeps-shee'i QM, Nw.

uw Y NEW@ ,ma N A: R E .m Y B Q Oct. 27, 1936. H. As. MARMoRsTElN Er AL y CONVEYING DEVICE Filed NOV. 1.6, 1935 s sheets-sheet 2 INVENTOR MA ocr. 27, l1936.

H. S. MARMORSTEIN FAL CONVEYING DEVICE Filed Nov.. 16, 19:55

3 Sheets-Sheet v3 INVENTRS A. Maj. mmf/W A'rroRNEY Patented Oct. 27, 1936 UNITED STATES PATENT GFFICE CONVEYING DEVICE Application November 16, 1933, Serial No. 698,254

21' Claims.

This invention relates to conveying devices, such as escalators, package conveyors and the like devices.

An object of this invention is to provide an escalator or conveyor having means yfor automatically starting to operate when a person approaches or mounts the same or anobject is deposited thereon.

Another object or this invention is to provide scribed, having means for automatically stopping at a predetermined period after starting to operate should no persons step thereon or objects be deposited thereon during said period, the construction being such that the period of operation is extended, if during said period another 4 person mounts thereon or another object is deposited thereon.

A further object of this invention is to` provide an escalator having photo-electric cell means for starting the operation thereof.

A still further object of this invention is to provide a conveyor of the character described having means for starting the operation of the conveyor automatically upon depositing an object thereon and for stopping the operation of said conveyor when the object moves off the conveyor.

A still further object of this invention is to provide a compact and strong conveying device of the character described, which shall comprise comparatively few and simple parts, be smooth and positive in operation, comparatively inexpensive to manufacture and yet practical and eflicient to a high degree.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement ofparts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claims.

In the accompanying drawings, in which is shown one of the various possible illustrative embodiments of this invention,

Figl 1 is an elevational, cross-sectional view of an escalator embodying the invention;

Fig. 2 is an enlarged, elevational, cross-sectional view of the switch device operated by a person approaching the escalator;

Fig. 3 is a wiring diagram, illustrating the electrical system for operating the structure shown in Fig. .1; y5 Fig. 4 is a partially diagrammatic view, illusan escalator or conveyor of the character dev trating a portion of an escalator caused to move by a person standing on any step of the escalator;

Fig. 5 is an elevational, cross-sectional View of the step shown in Fig. 4;

Fig. 6 is a cross-sectional View taken on line 5 6--6 of Fig, 5;

Fig. 'l is a diagrammatic view illustrating an electrical system similar to that shown in. Fig. 3, but operated by photo-electric cells;

Fig. 8 is a rear elevational View of the top of iu the escalator;

Fig. 9 is a side, elevational, partially diagrammatic view of a belt conveyor for articles provided with automatic starting and stopping means embodying the invention;

Fig. 10 is a view similar to Fig; 9, but illustrating a modied construction;

Fig. 11 is a top plan view of a part of the structure shown in Fig. 10 with parts in cross-section; and

Fig. 12 is a side elevational view of the structure shown in Fig. 11.

Referring now in detail to the drawings, I0 designates an escalator embodying the invention, and may comprise an escalator of usual construction provided with accessories, described in detail hereinafter. i

The escalator construction may comprise the usual motor I I adapted to drive through gearing I2 a` belt I3. The belt I3 is adapted to drive a sprocket wheel Ill-mounted on axle I5 below the upper landing or floor I5. Mounted'below the lower landing or floor I6 is an axle I1. on which there is mounted the sprocket wheel I8. Interconnecting the sprocket wheels are the steps 20 mounted on the usual chain 2 I and each having a pair of rollers 22 and 23 coacting with guides 24v and 25. respectively, in the usual manner.

As is well known in the art, the outer rollers 23 engage the sprocket wheels I4 and I8 for causing movement of the series of steps. The steps are maintained in. proper levels by means of the guides 2Q and 25 cooperating with the rollers 22 and 23. This construction is well known in the art.

On opposite sides of the steps are provided the railing housings 2l' and 2B having the usual inner belts 29 adapted to move around pulleys in the usual manner when the escalator is moving, said belts 2Q serving as a hand grasp for the passengers on the escalator.

Means is provided for starting the operation of the escalator automatically When a person appreaches the escalator so that the escalator need not continue running continuously without passengers. To this end, the railings 21 and 28 are extended beyond the top and bottom of the escalator. The railing is further provided with outer belts 38, similar to the belts 29 but operated by a separate removable motor and being marked with transverse stripes 3|. Thus, even though the escalator is at a standstill, the belts 3|) may be caused to move to indicate to passengers that the escalator is set for operation, and the direction of such operation.

Mounted between the rails 21 and 28 on the lower level I6 is a switch 33 comprising a pair of iioor members 34 and 35 hinged together, as at 36, and mounted on rubber blocks 31 supported on a bracket 38, xed below the iioor. The ends of the hinged members 34, 35 may be interconnected to the lower level iioor I6 by means of plates 39, or in any other suitable manner. Disposed below said members 34 and 35 and fixed within the floor is a box 4|) on which there is mounted a bracket 4| having a terminal 42. There is also mounted on the bracket 42 and insulated therefrom, a member 44, to which there is hinged a lever 45 provided with a terminal 46 adapted to contact the terminal 42. A small coil tension spring 41 serves to normally retain the terminals 42 and 46 out of contact. A screw 49 is screwed to the lever 45 and contacts the underside of the member 34.

When a person approaching the escalator steps on either of the members 34 or 35, the lever 45 is rotated for bringing the terminals 42 and 4S into contact. A wire 5|) is attached to the bracket 4| by means of a binding post, and a wire 5| is interconnected to the member 4| by a binding post. The wire 50 is thus electrically connected to the terminal 42, whereas the wire 5| is electrically connected through the member 4| and lever 45 to the terminal 46.

Very slight movement of the members 34 and 35 is necessary for operating the switch 45. The rubberblocks 31 normally maintain the members 34 and 35 slightly lifted at the center merely sufficiently to open the gap between the terminals 42 and 46. The switch 45 forms part of the electrical system illustrated in Fig. 3 of the drawings.

A switch 33a similar to switch 33 shown in Fig. 2 is mounted on the upper level or floor I5, between the rails 21 and 28 so that a person transported upwardly on the escalator and stepping off the escalator, operates the top switch by stepping thereon. When the escalator is set for transporting persons down, a person on the oor I5 approaching the escalator will step on the switch 33a at the top and start movement of the escalator in the manner hereinafter explained.

Referring now to Fig. 3 of the drawings, designates the motor, and numeral 54 designates a double throw double blade knife switch mounted on the usual panel board. The switch 54 is adapted tof cooperate with a pair of lower terminals 56 and 51 and also with a pair of upper terminals 58 and 59. The terminal 56 is interconnected to the terminal 59 by a conductor 50. The terminal 51 is interconnected to the motor field by wire 51a. The terminal 59 is interconnected to the motor field by the wire 59a, and the terminal 58 is interconnected to the motor field by wire 58a. The wires 51a, 59a and 58a form the three wire system for the field of the reversible motor the wire 59a being the central wire of the three wire system. The switch 54 is provided with blades 54a and 54h and may be moved upwardly to contact the terminals 56, 51. The blade 54h is interconnected by wire 62,

to one of the line feed wires 63. The other blade 54a is connected by wire 64 to a fixed terminal 65. A second fixed terminal 66, complementary to the terminal 65 is connected by wire 61 to the other feed line wire 68.

Fig. 3 also shows, diagrammatically, the manually actuated switches 33, 33a at the bottom and top of the escalator. The wire 5| interconnects the bottom lever 45 to a fixed terminal 52. A complementary spaced, fixed terminal 52a is connected by wire 5|a to the top lever 45. The wire 59 interconnects the terminal 42 of switch 33 to the terminal 42 of switch 33a.

There is further provided, adjacent the top and bottom of the escalator, a pair of similar switches 10. Each comprises a bracket 1| on which there is slidably mounted a plunger 12 having a conductor head 13 and adapted to be retracted by means of a coil compression spring 14. The head 13 is adapted toy interconnect fixed terminals 15 and 16 at one end of wires 11 and 18. The wires 11 and 18 extend from the bottom of the escalator to the top and are provided with the terminals 15 and 16 at the opposite ends thereof. The circuit through said wires may be closed by means of the conductor head 13 of the plunger 12 at either the top or bottom switch 19.

Normally, the plungers 12 are maintained out of contact with respect to the terminals 15 and 16, but may be moved into switch closing position by pressing the plunger to compress the spring 14. For maintaining the plunger in switch closing position, there is provided a bell crank having a hook 8| adapted to engage the head 13 when the plunger is moved to switch closing position. For releasing the plunger there is provided a spring pressed rod 82 adapted to rotate the bell crank 80. Thus when the hook 8| is in engagement with the head 13 to hold the same in switch closing position, pressure on the rod 82 will cause rotation of the bell crank 80 and disengage the hook 8| from the head 13, thus permitting the spring 14 to retract the plunger 12. The circuit through the wires 11 and 18 may thus be closed and opened either from the top or bottom of the escalator.

The wire 18 is connected, as at 18a, to the feed line wire 68. The wire 11 is connected by wire 86, as at 81, to the other line feed wire 63. The

wire 50 interconnecting the terminals 42, is connected by wire 88 to the line feed wire 63. The relay is adapted to actuate a switch 90 connected by wire 9| to the feed line wire 68. Said switch 99 is adapted to engage a xed Contact 94 connected by wire to a relay 96 operating a quick closing and slow opening time switch 91 of any suitable well known construction. The relay 96 is interconnected by wire 99 to a switch arm 99a adapted to move into contact with either terminal 52 or 52a. The time switch 91 is adapted to close the terminals 65, 66.

The operation of the device will now be described. The double throw switch 54 is first moved either up or down, depending upon which direction it is desired to operate the escalator. Let us assume that for moving the escalator up the switch 54 is moved upwardly to engage the terminals 58 and 59. The switch arm 99a is also moved into contact with terminal 52. Thereafter one of the switches 10 must be actuated to set the circuit for operation. Upon pressing the plunger 12, shown on the left of Fig. 3, the circuit through the relay 85 will be closed, the current passing from the line wire 68 to the wire 18,

towire 11, to wire 84, through relay 85, through wire 88, to the other line feed wire 63.

When the relay is closed, the switch 90 is moved downwardly for engaging the fixed contact 84. The escalator does not yet start to operate. However, should a person approaching the escalator from the bottom, step on switch 33 located at the lower level I8, the terminals 42 and 46 will contact. The current will then pass through the relay 96 of the time switch 91. The current passes from the line feed wire 08 to the wire 9|, through the switch 9|), through the wire 95, through the relay 86, through wire 99, switch arm a, to wire 5|, then through the wire 50 and wire 88 to the other feed line wire 63. When the relay 98 is energized, the time switch closes quickly, thus closing the gap between the two fixed terminals 65 and S6. The current then passes through the motor to start operation oi the same. The current passes through the line feed wire 68, then through terminals'ii, 65, through wire 84, blade 54a, terminal 58, wire 58a, to the motor field. The current passes from the eld through wire 50a, through terminal 59, through blade 54h, and wire 82, to the other feed line wire 63.

The time switch 01 opens after a predetermined time. When the person steps off the escalator, he again steps on the upper switch 33a but this switch is cut out because switch arm 99a has been moved into contact with terminal 52. The predetermined period is preferably longer than is required for a person to travel from the bottom to the top of the escalator. Thus, when a person steps on the escalator, the escalator starts to operate and continues operating, until the time switch 81 opens and breaks the current through the moto-r to stop .the escalator. If during said predetermined period another person approaches the escalator, the time switch will again move to full closing position, and the predetermined period of operation is extended. Thus, when no persons are using the escalator, the escalator remains inoperative. The escalator, furthermore, starts to operate automatically when a person approaches the escalator to use the same, and continues in operation for a time after the person has left the escalator to eliminate short stops of the escalator.

If the escalator is set for upward movement, the motor for operating the belts 30 is turned on and the belts 30 move continually upwardly to indicate to the passengers that the escalator is set for moving upwardly, and said belts 30 continue to move even when the escalator stops. If it is desired to set the escalator fordownward movement, the motor for operating the belts 38 is reversed. The switch d4 is moved downwardly, the switch arm 09a moved into contact with terminal 52a, and one of the switches l0 closed. Should a person step on the upper switch 33a the current through the time switch is again closed. The current in the field of the motor, however, is reversed, since the current passes from the line feed wire E8 through wire 61, through the terminals 65, 0E, through wire 84, through blade 54a., through terminal 50 and conductor E0, to terminal 59 and wire 50a. The current then passes from the field through wire 51a, to terminal 51, blade 54h, wire 02 to the line feed wire 03. The switch members 10 should be located in a position from which the operator of said switches may observe the entire escalator.

The fioor switches 83, 33a may be located at any suitable distance from the top and bottom of the switch escalator to-permit sufficient time to elapse for overcoming inertia so that the escalator acquires full speed before the person stepping on the switch members actually reaches the first exposed step of the escalator.

In Fig. 7 there is shown a construction similar to that disclosed in Figs. l and 3 except that instead of the structure shown in Fig. 2 there is substituted a photo-electric cell switch device. In accordance with Fig. '1 there is mounted in the side rails 21 and 28 at the bottom and top of the escalator, boxes |00 and |0|. Thus at the bottom of the escalator on both sides of the rail there is mounted a box |00 in the rail 21 and box |0I in rail 28, as indicated in Fig. 8 of the drawings. Within box |0| is a lamp |02 connected to a suitable source of electric current, the rays of said lamp passing through a small opening |83 in the box |0| and passing through an opening |04 in the box |00.

Within the box |00 there is mounted a photoelectric cell |05 of usual construction, connected to an amplifying circuit |06 of any suitable design, the current from the amplifying circuit being adapted to energize a relay |01. The relay |01 when energized, maintains a switch |00 out of contact with respect to a fixed contact |00. The fixed contact |09 is connected to the wire 50. The switch arm |08 is connected to the wire 5|. The wires 50 and 5| may be connected to the relay 96 for the time switch 91 and to the feed line Wire 63 in the manner shown in Fig. 3 of the drawings. Thus, normally when the light passes to the opening |04, the motor does not operate. However, should a person approaching the escalator, pass between the boxes |00 and |0| the passage of light to the photo-electric cell is momentarily interrupted, the relay is de-energized, the switch |08 drops into contact with the xed contact |09, and the circuit for the time switch is closed for closing the motor circuit.

In Figs. 4, 5 and 6 there is shown a modified construction wherein the switches 33, 33a are replaced by switches mounted directly on the steps of the escalator. In accordance with the structure shownin Figs. 4, 5 and 6, there is suitably mounted alongside the escalator and preferably within the rails, a pair of elongated conductors l l5 and IIB constituting third and fourth rails.

Each step in the escalator is provided with a hinged cover member |1. Pivoted to the underside of each step is a lever IB to which there is screwed a screw ||9 extending through an opening |26! in the top wall of the step. A coil compression spring |22 serves to press the screw |50 against the underside of the hinged member ||1 for maintaining the same in slightly lifted position. The lever H8 is provided with a pair of spaced rollers |23 and |24 interconnected b?! a conductor |25. In normal position, the roller |24 contacts the third rail ||5, but the roller |23 is out of contact with the fourth rail l I6. Should a person step on any step, the hinged cover lil of said step will press down on the screw 9 for causing pivotal movement of the lever H8 in a clockwise direction, looking at Fig. 5 of the drawings. The roller |23 will then be moved into contact with the fourth rail llt, bridging the circuit through said rails. The third rail ||5 is connected to the wire 11. The wire 18 is connected to the feed line wire 68.

For the electrical system shown in Fig. 4, there is also provided a double throw double blade |30 having blades |3| and |32. Said blades are adapted when the switch is pushed upwardly, to engage a pair of xed terminals |34 and |35. When the switch is swung downwardly, the blades |3| and |32 are adapted to contact a pair of fixed contacts |36 and |31. 'Ihe terminal or fixed contact |36 is interconnected by a conductor |36a to the terminal or fixed contact |35. The eld of the motor is connected by a central wire |40 to the terminal |36. When the wire |4| from the field is connected to the terminal |31 the third wire |42 extending from the field is connected to the terminal |34. The blade |32 is connected by wire |43 to the feed line 63. The operation of the system shown in Fig. 4 will now be described.

The switch |30 is first swung upwardly and one of switches 10 closed. Should anyone thereafter step on any step of the escalator, the circuit through the third and fourth rails is closed. The fourth rail I6 is interconnected to the blade |3| through a wire ||6a. The motor then begins to operate since the current passes from the feed line 60 to the wire 98, then to wire 11, then to the third rail ||5, through the conductor |25, to the fourth rail H0, through wire ||6a, to the blade |3|, then to terminal |34, then through wire |42 to the field. From the eld the current passes through the central wire |40, to terminal |36, conductor |36a, terminal |35. blade |32, to the wire |43, to the feed line 63. To reverse the direction of the motor the switch |30 is merely swung downwardly for reversing the direction of the current through the field.

In Fig. 9 there is shown a conveyor of the belt type for transporting packages, boxes, etc. The belt is shown as passing around a pair of pulleys |5|, |52. The pulley |52 is connected by a belt |53 to a pulley |54, the latter being connected through suitable gearing |55 to an operating motor |56. Means is provided for operating the motor |56 automatically upon pushing a package onto the top of the belt conveyor |50. To this end, there is hinged to a platform |51 a leaf |58. A package or box may be pushed from the platform |51 onto the inclined leaf |58 from whence it will slide onto the belt. Pivoted to the platform |51 is a lever |60 pressed by a spring |6I. A screw |62 screwed to the end of the lever contacts the underside of the leaf |58, the spring |62 serving to maintain the screw in contact with said leaf.

Attached to the underside of platform |51 is a fixed terminal |64, and fixed to the outer end of the lever is a complementary terminal |65 normally maintained out of contact with respect to the terminal |64 by the spring |6|.

It will now be noted that when a package is pushed onto the leaf |58 the leaf will swing downwardly for rotating the lever |60 in a counterclockwise direction to bring the terminal |65 into contact with the terminal |64.

There is further provided a switch 10a similar to the switch 'l0 described above. rI'he head of the plunger portion of said switch is adapted to bridge the gap between the pair of fixed contacts |10 and |1|. The contact |10 is connected directly to the current of the feed line wires |12, by wire |14 to the terminal |65 on the lever |60. The xed contact |1| is connected by wire |15 to a relay |16 adapted to actuate a quick closing and slow opening time switch |11. The relay 616 is in turn connected by wire |18 to the other terminal |64. The time switch |11 is adapted to close the gap between a pair of xed contacts and |3l. The fixed Contact |8| is connected directly to the wire |15, whereas the fixed contact |00 is connected by wire |83 to the motor. The motor is further connected by wire |84 to the feed line wire |13.

The operation of the device shown in Fig. 9 will now be described. The switch 10a. is rst closed to bridge the gap between the contacts |10, |1|. Thereafter, should a package be shoved onto the leaf |58, the terminal |65 will be swung into Contact with the terminal |64. This action will close the circuit through the relay |16 for actuating the time switch, the current passing from line |13 to wire |14, through the contacts |65, |64, through wire |18, to the relay; thence to wire |15, through the contacts |10, to the other line wire |12. The time switch closes quickly and thus closes the circuit through the motor. The motor circuit is closed for a predetermined period after which the time switch opens and breaks the motor circuit. Of course, the period during which the time switch is closed is regulated so as to be greater than that required for transporting the package the full length of the conveyor.

In Figs. l0, 11 and l2 there is shown a modified construction, in accordance with which pushing a package onto the conveyor automatically starts the conveyor, and passage of the package off the conveyor automatically stops the action of the conveyor if no other packages are being conveyed.

Referring now to Figs. l0, 11 and 12 of the drawings, the same disclose abelt passing over a pair of rollers or pulleys |9| and |92. The roller |92 is driven by means of a belt |94 received on pulley |95 driven by motor |96 connected thereto by suitable gearing. The roller |92 is provided for the purpose hereinafter appearing, with a pair of spaced, metal, peripheral rings |91 and |98.

There is further provided on the shaft for said roller |92, a pair of slip rings |91a and |9811 contacting brushes |99 and 200. The brush |99 is connected by wire 20| to the field of motor |96, said field in turn being connected to the feed line 202. The other brush 200 is connected directly to the other feed wire 203. The belt |80 is provided on the inner surface thereof with two spaced, endless flexible metallic strips 205 and 206. The strips 205 and 206 are attached to the belt by any suitable rivets and contact the rings |91 and |98, respectively, continuously. Incorporated into the belt |90 are two pairs of concentric coil springs 201 and 208, extending entirely around the belt. Each pair of coil concentric springs are adapted to be normally out of contact with each other when no article is de- 'i posited on the belt. However, when an article is deposited on the belt, the concentric coil springs contact one another. The outer coil spring 208 0f each pair of concentric springs is connected by wire 209 to the inner coil spring 201 of the other pair. The outer coil springs 208 are further connected by wires 2|0 and 2| to the metal strips 205 and 206, respectively. The metal rings |91 and |98 are furthermore connected by wires 2|2 and 2|3 to the slip rings |91@ and |98a., respectively.

The operation of the device will now be described. Normally the belt is at rest, no current passing through the motor by reason of the outer coil springs 208 being out of contact with respect to the inner coil springs 201. However, should any package be deposited on the belt, the spring 208 at some part of the belt will contact an adjacent portion of the inner spring 201 and complete the circuit through the motor. The circuit passing from the feed line 203 to the brush 2110, toslip ring lga, through wire `2|3, to ring |98,- to iiexible metal strip 206, through wire 2| l, to outer coil 20%, of one pair o-f concentric springs, to inner coil 201 of saidpair of springs, through wire2il9, to the outer coil 298 of the other pair of concentric springs, then through wire Zl to the flexible metal strip 285, then to ring l9'l, then through wire 2i2, to slip ring l'iai, to brush |99, to wire 20|, to the field of the motor |96, and then to feed line wire M2. It will be noted that the current through the motor -will be maintained as long as any packages are on the belt and any portion of the outer coil springs contacts their respective inner coil springs. However, when no packages are on the belt, the current through the motor is broken and the operation of the belt ceases.

It will thus be seen that there is provided a devicein which the several objects of this invention are achieved, and which is well adapted to meet the conditions or practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments set forth, it is to be understood that all matter herein set forth or shownin the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

I-Iaving thus described our invention, we claim as new and desire to secure by Letters Patent:

l. In combination, a conveying device, means controlled by the object to be conveyed for automatically starting the operation of said device either in one direction or the other, including means for selectively setting said device for operation in one of said directions only, and means including a single time switch for automatically stopping the operation of said device in either direction after a predetermined period of operation.

2. In combination, a conveying device, means controlled by the object to be conveyed for automatically starting the operation of said device either in one direction or the other, including means for selectively setting said device for movement in one of said directions only, means for automatically stopping the operation of said device after a predetermined period of operation, and means for automatically extending said period of operation.

3. In combination, an escalator movable in opposite directions, and `means controlled by a p'erson approaching the escalator to mount the same for automatically starting the operation of said escalator in one direction, and belt means alongside the escalator belts for indicating the direction the escalator will move upon being started.

4. In combination, an escalator, a pair oi switches on the floors adjacent the upper and lower ends of the escalator and adapted to be stepped upon by persons `approaching the escalator `for using the same, a reversible motor for operating said escalator in the up or down direction, means for setting the motor to operate the escalator in one or the other of said directions, and means for automatically starting the motor for operating the escalator in the direction for which it is set for a predetermined period when a person approaching the escalator in said direction, steps on the switch at the adjacent end of the escalator.

5. In combination, a conveyer, reversible means capable of moving said conveyor in opposite directions, means for selectively setting said rst means to move the conveyor in one direction only,

when operation of said means is started, and means to automatically start` operation of said conveyor by said first means in the direction for which the same is set, by an object approaching the conveyor in said direction.

6. In combination, a conveyor, reversible means for moving said conveyor in opposite directions,

means for selectively setting saidfirst means to move the conveyor in one direction only when operation of said means isv started, and means to automatically start operation of `said conveyor by said first means in the directio-n for which the same is set, by an object approaching the conveyor in said direction, and moving means for indicating the direction for which the conveyor is set to move. i

'7..In combination, an escalator, a motor adapted for operating said escalator in opposite directions, means for selectively setting the motor ,for actuating the escalator for movement in one of said directions, and means controlled by a person approaching the escalator in said direction to mountthe same, for automatically starting operation of the escalator by said motor in the direction for which it is set.

8. In combination, an ascalator, a motor adapted for operating saidescalator in opposite directions, means for selectively setting the motor for actuating the escalator for movement in one of said directions, means controlled by a person direction for which the escalator is set to move.

9. In combination, an escalator, a motor adapted for operating said escalator in opposite directions, means for selectively setting the motor for actuating the escalator for movement in one of said directions only, means controlled by a person approaching the escalator Vin said direction to mount the same for automatically starting operation of the escalator in the direction for which it is set, and a member disposed alongside the escalator having marks thereon, `and means for moving saidmember in the direction for which the escalator is set to move, for indicating said direction.

. 10. In combination, an escalator, a pair of switches on the floors adjacent the upper and lower ends of the escalator, adapted to be stepped upon by persons approaching the escalator for using the same, a motor for operating the escalalator, a circuit for said motor including a quick closing and slow opening time switch, a circuit ,l

for said time switch, and means for thro-wing either one of said pair of switches into said last circuit and cutting the other of said pair of switches out of said circuit.

1l. In combination, an escalator, a pair of switches on the floors adjacent the upper and lower ends of the escalator, adapted to be stepped upon by persons approaching the escalator for using the same, a motor for operating the escalator, a circuit for said motor including a quick closing and slow opening time switch, a circuit for said time switch, and means for throwing either one of said pair of switches into said last circuit and cutting the other of said pair of switches out of said circuit, said last circuit including a relay switch, a circuit for the coil of said relay switch, and switches adjacent the upper and lower ends of the escalator for controlling said relay coil circuit.

12. In combination, an escalator, a pair of switches on the floors adjacent the upper and lower ends of the escalator, adapted to be stepped upon by persons approaching the escalator for using the same, a reversible motor for operating said escalator in the up or down direction, a circuit for said motor including means for reversing said motor, a quick closing and slow opening time switch interposed in said circuit, a circuit for operating said time switch, means for throwing either one of said pair of switches into said last circuit, and cutting the other of said pair of switches out of said last circuit.

13. In combination, an escalator, a pair of switches on the iloors adjacent the upper and lower ends of the escalator, adapted to be stepped upon by persons approaching the escalator for using the same, a reversible motor for operating said escalator in the up or down direction, a circuit for said motor including means for reversing said motor, a quick closing and slow opening time switch interposed in said circuit, a circuit for operating said time switch, means for selectively throwing one of said pair of switches into said last circuit and cutting the other of said pair of switches out of said last circuit, another switch interposed in said last circuit, a relay for actuating said last switch, a circuit for the coil of said relay, and means for closing the relay coil circuit from either the upper or lower ends of the escalator.

14. In combination, an escalator, a pair of switches on the iioors adjacent the upper and lower ends of the escalator and adapted to be stepped upon by persons approaching the escalator for using the same, a reversible motor for operating said escalator in the up or down direction, means for setting the motor to operate the escalator in one or the other of said directions, and means including a single time switch for automatically starting the motor and operating the escalator in the direction for which itis set for a predetermined period when a person approaching the escalator in said direction, steps on the switch at the adjacent end of the escalator, and means for rendering inoperative the switch at the other end of the escalator.

l5. In combination, a conveyor, reversible means for moving said conveyor in opposite directions, means for selectively setting said first means to move the conveyor in one direction only when operation of said means is started, and means to automatically start operation of said conveyor by said rst means in the direction for which the same is set, by an object approaching the conveyor in said direction, and moving means for indicating the direction for which the conveyor is set to move, said means comprising a belt having markings thereon movable alongside the escalator belt and means for selectively moving said marked belt in opposite directions.

16. In combination, a conveyor, reversible means capable of moving said conveyor in opposite directions, means for selectively setting said rst means to move the conveyor in one direction only, when operation of said means is started, and means to automatically start operation of said conveyor by said rst means in the direction for which the same is set, by an object approaching the conveyor in said direction, and means including a single time switch for automatically stopping operation of said escalator in either direction after a predetermined period of operation.

17. In combination, a conveying device, photoelectric 'cell means controlled by the object to be conveyed for automatically starting the operation oi said device either in one direction or the other, including means for selectively setting said device for operation in one of said directions only, and means including a single time switch for automatically stopping the operation of said device in either direction after a predetermined period of operation.

18. In combination, a conveying device, means controlled by the object to be conveyed for automatically starting the operation of said device either in one direction or the other, including means for selectively setting said device for movement in one of said directions only, photo-electric cell means for automatically stopping they operation of said device after a predetermined period of operation, and means for automatically extending said period of operation.

19. In combination, a conveyor, reversible means capable of moving said conveyor in opposite directions, means for selectively setting said rst means to move the conveyor in one direction only, when operation of said means is started, and photo-electric cell means to automatically start operation of said conveyor by said first means in the direction for which the same is set, by an object approaching the conveyor in said direction.

20. In combination, a conveyor, reversible means for moving said conveyor in opposite directions, means for selectively setting said rst means to move the 'conveyor in one direction only, when operation of said means is started, and photoelectric cell means to automatically start operation of said conveyor by said rst means in the direction for which the same is set, by an object' approaching the conveyor in said direction, and moving means for indicating the direction for which the conveyor is set to move.

21. In combination, an escalator, a motor adapted for operating said escalator in opposite directions, means for selectively setting the motor for actuating the escalator for movement in one of said directions, and photo-electric cell means controlled by a person approaching the escalator in said direction to mount the same, for automatically starting operation of the escalator by said motor in the direction for which it is set.

HENRY S. MARMORSTEIN. ROBERT A. NEUSCHOTZ. 

